That's an unusually high non-recovery/wounding rate for sure. Mine was substantially less than that but I just refused to give up on tracking and often went into the wee hours before starting over in the daylight. I also really pounded into the guys to not hurry a shot but recognized that crap happens. For me, archery can be an effective and efficient tool but it takes absolute total concentration and patience to make the right shot. You can get away with a lot less with rifle.